Sometimes both. The action inlets always fit, they just lack consistency. But It's usually minor fitting to ensure the barrel is free floated and is centered. Only occasionally do they need to be returned for further corrections. I'd say one out of 3 come perfect and immediately ready for bedding sans issues. But don't get me wrong, I love Manners stocks and so do my customers. The only hassle for a builder like myself is having to spend the extra time on them which is lost $. I cannot charge my customers for the extra work done on them when sending them back for repairs is not an option, usually when time is of the essence.